<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
	<style>
.circle {
width: 200px;
height: 200px;
position: absolute;
top: 50%;
left: 50%;
margin: -100px 0 0 -100px;
}

.circle1,
.circle2,
.circle3,
.center {
position: absolute;
left: 50%;
top: 50%;
margin: -30px 0 0 -30px;
width: 60px;
height: 60px;
border-radius: 30px;
background-color: #666666;
}

.center {
position: absolute;
left: 50%;
top: 50%;
margin: -35px 0 0 -35px;
width: 70px;
height: 70px;
border-radius: 35px;
background: #111111;
/ text-align: center;
line-height: 70px;
color: #EAEAEA;
font-size: 16px;
font-family: '';
}

.circle1 {
-webkit-animation: circle 3s linear infinite;
animation: circle 3s linear infinite;
}

.circle2 {
-webkit-animation: circle 3s linear 0.8s infinite;
animation: circle 3s linear 0.8s infinite;
}

.circle3 {
-webkit-animation: circle 3s linear 1.6s infinite;
/* Safari and Chrome */
animation: circle 3s linear 1.6s infinite;
}

@-webkit-keyframes circle {
/* Safari and Chrome */
from {
opacity: 1;
-webkit-transform: scale(0);
}
to {
opacity: 0;
-webkit-transform: scale(3);
}
}
	</style>
</head>
<body>
   <h1>111</h1>
   <h1>222</h1>
   <h1>333</h1>
   <h1>444</h1>
   <h1>555</h1>
   <h1>666</h1>
<div class='circle'>
<div class='circle1'>&nbsp;</div>
<div class='circle2'>&nbsp;</div>
<div class='circle3'>&nbsp;</div>
<div class='center'></div>
</div>
</body>

<script>

let dom = document.querySelectorAll('h1');
// console.log(dom)
dom.forEach(element => {
    element.onclick
});
    // [...dom].forEach(element => {
    //     console.log(element)
    // });

    
</script>
</html>